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1.
Gluon propagator is investigated for pure Yang-Mills SU(3) gauge theory in field-strength approach. It isfound that instantohs provide a homogeneous solid-like medium background which generates finite nonzero momentumgluon propagator and gluon receives effective mass. 相似文献
2.
Gluon propagator is investigated for pure Yang-Mills SU(3) gauge
theory in field-strength approach. It is found that instantons
provide a homogeneous solid-like medium background which generates
finite nonzero momentum gluon propagator and gluon receives
effective mass. 相似文献
3.
[1]R.T. Cahill and C.D. Roberts, Phys. Rev. D32 (1985)2419.
[2]P.C. Tandy, Prog. Part. Nucl. Phys. 39 (1997) 117; C.D.Roberts, R.T. Chill, and J. Praschiflca, Ann. Phys. (N.Y.)188 (1988) 20; M.R. Frank, P.C. Tandy, and G. Fai, Phys.Rev. C43 (1991) 2808; M.R. Frank and P.C. Tandy, Phys.Rev. C49 (1994) 478; M.R. Frank and C.D. Roberts,Phys. Rev. C53 (1996) 390; P. Maris and C.D. Roberts,Phys. Rev. C56 (1997) 3369; C.W. Johnson and G. Fai,Phys. Rev C56 (1997) 3353; P. Maris, C.D. Roberts,and P.C. Tandy, Phys. Lett B420 (1998) 267; XiaoFu LU, Yu-Xin LIU, Hong-Shi ZONG and En-Guang ZHAO, Phys. Rev. C58 (1998) 1195; Hong-Shi ZONG,Xiao-Fu LU, Jian-Zhong GU, Chao-Hsi CHANG, and EnGuang ZHAO, Phys. Rev. C60 (.1999) 055208; Hong-Shi ZONG, Yu-Xin LIU, Xiao-Fu LU, Fan WANG, and EnGuang ZHAO, Commun. Theor. Phys. (Beijing, China)36 (2001) 187.
[3]M.R. Frank and T. Meissner, Phys. Rev. C53 (1996)2410.
[4]T. Meissner, Phys. Lett. B405 (1997) 8.
[5]C.D. Roberts and A.G. Williams, Prog. Part. Nucl. Phys.33 (1994) 477, and the references therein.
[6]H.B. Tang and R. J. Furnstahl, hep-ph/9502326.
[7]M. Shifman, A. Vainshtein, and V. Zakharov, Nucl. Phys.B147 (1979) 385.
[8]L. Reinders, H. Rubinstein, and S. Yazaki, Phys. Rep.127 (1985) 1; S. Narison, QCD Spectral Sum Rules, World Scientific, Singapore (1989), and the rererences therein.
[9]Hong-Shi ZONG, Jia-Lun PING, Hong-Ting YANG,Xiao-Fu LU, and Fan WANG, nuth-th/0201001.
[10]C.D. Roberts, A.G. Williams, and G. Krein, Int. J. Mod.Phys. A7 (1992) 5607. 相似文献
4.
The mixed quark-gluon condensate from the global color symmetry model is
derived. It is shown that the mixed quark-gluon condensate depends
explicitly on the gluon propagator.
This interesting feature may be regarded as an additional constraint on the model of gluon propagator. The values of the mixed quark-gluon condensate from some ansatz for the
gluon propagator are compared with those determined from QCD sum rules. 相似文献
5.
A modified method for calculating the nonperturbative quark vacuum condensates from the global color symmetry model is derived. Within this approach it is shown that the treatment of quark vacuum condensates is different from that in the previous studies. As a special case we calculate the π and tensor vacuum susceptibilities. A comparison with the results of the other nonperturbative QCD approaches is given. 相似文献
6.
ZONG Hong-Shi SUN Wei-Min 《理论物理通讯》2006,46(4):717-722
Based on the global color symmetry mode/ (GCM), a method for obtaining the quark loop effects on the dressed gluon propagator in GCM is developed. In the chiral limit, it is found that the dressed gluon propagator containing the quark loop effects in the Nambu-Goldstone and Wigner phases are quite different. In solving the quark self-energy functions in the two different phases and subsequent study of bag constant one shouM use the above dressed gluon propagator as input. The above approach for obtaining the current quark mass effects on the dressed gluon propagator is quite general and can also be used to calculate the chemical potential dependence of the dressed gluon propagator. 相似文献
7.
ZONG Hong-Shi SUN Wei-Min 《理论物理通讯》2006,46(10)
Based on the global color symmetry model (GCM), a method for obtaining the quark loop effects on the dressed gluon propagator in GCM is developed. In the chiral limit, it is found that the dressed gluon propagator containing the quark loop effects in the Nambu-Goldstone and Wigner phases are quite different. In solving the quark self-energy functions in the two different phases and subsequent study of bag constant one should use the above dressed gluon propagator as input. The above approach for obtaining the current quark mass effects on the dressed gluon propagator is quite general and can also be used to calculate the chemical potential dependence of the dressed gluon propagator. 相似文献
8.
WANG Jing SHI Yuan-Mei HOU Feng-Yao SUN Wei-Min ZONG Hong-Shi PING Jia-Lun 《理论物理通讯》2008,49(4):1001-1003
We do a numerical calculation on the quark-loop effects on the dressed gluon propagator in the chiral limit. It is found that the quark-loop effects on the dressed gluon propagator are significant in solving the quark propagator in the rainbow approximation of the Dyson-Schwinger equation. The approach we used here is quite general and can also be used to calculate both the chemical potential and current quark mass dependence of the dressed gluon propagator. 相似文献
9.
The hard-loop resummed propagator in an anisotropic QCD plasma in general linear gauges are computed. We get the explicit expressions of the gluon propagator in covariant gauge, Coulomb gauge and temporal axial gauge. Considering one gluon exchange, the potential between heavy quarks is defined through the Fourier transform of the static propagator. We find that the potential exhibits angular dependence and that there is stronger attraction on distance scales on the order of the inverse Debye mass for quark pairs aligned along the direction of anisotropy than for transverse alignment. 相似文献
10.
Based on the quark propagator in the instanton dilute liquid approximation, we have determined the nonlocal four-quark condensate at the mean-field level in the framework of global color symmetry model. By making use of this formula, the vacuum susceptibility (pionsusceptibility) was calculated in this paper. The theoretical analysis and numerical calculation show that even at the mean-field level the naive vacuum saturation approximation is not a good approximation when we consider nonlocal four-quark condensate. 相似文献
11.
ZHOU Li-Juan GU Yun-Ting MA Wei-Xing MENG Cheng-Ju PAN Ji-Huan 《理论物理通讯》2008,49(1):181-188
Based on the Global Color Symmetry Model, the non-perturbative Q, CD vacuum is investigated in the parameterized fully dressed quark propagator. Our theoretical predictions for various quantities characterized the QCD vacuum are in agreement with those predicted by many other phenomenologieal QCD inspired models. The successful predictions clearly indicate the extensive validity of our parameterized quark propagator used here. A detailed discussion on the arbitrariness in determining the integration cut-off parameter ofμ in calculating QCD vacuum condensates and a good method, which avoided the dependence of calculating results on the cut-off parameter is also strongly recommended to readers. 相似文献
12.
13.
In this paper, the gluon propagator in Landau gauge has been studied
on a lattice, including the quenched and the unquenched one. The
small geometry size of lattice we use is 163×32, and the
big one is 203×64. For the quenched approximation, we fit
the numerical results and give a little different fitting values. We also obtain unquenched effects by comparing the gluon propagator resulting from the quenched and unquenched configurations, for both the two-flavor and three-flavor cases. For the unquenched
configurations, an obvious quark mass dependence has not been found in
the small quark mass case, but is found in the three-flavor case when the quark mass is big. 相似文献
14.
ZHANG Yan-Bin PING Jia-Lun LV Xiao-Fu ZONG Hong-Shi 《理论物理通讯》2008,50(7):125-128
In this paper, the gluon propagator in Landau gauge has been studied on a lattice, including the quenched and the unquenched one. The small geometry size of lattice we use is 16^3 × 32, and the big one is 20^3 × 64. For the quenched approximation, we fit the numerical results and give a little different fitting values. We also obtain unquenched effects by comparing the gluon propagator resulting from the quenched and unquenched configurations, for both the two-flavor and three-flavor cases. For the unquenched configurations, an obvious quark mass dependence has not been found in the small quark mass case, but is found in the three-flavor case when the quark mass is big. 相似文献
15.
We exhibit a method for obtaining the low chemical potential dependence of the dressed quark propagator from the dressed-quark propagator,which provides a means of determining the behavior of the chiral and deconfinement order parameters.A comparison with the results of previous researches is given. 相似文献
16.
Based on the determined bilocal field in the global color symmetry model, the effective quark-quark interaction is deduced explicitly in this letter. The result shows that, except for the normal one-π and one-σ exchange terms, the confinement terms with screening factors can automatically be obtained. 相似文献
17.
In color superconductor the gluon condensate drops down at moderate density but goes up at high density and can even exceed its vacuum value when the density is high enough. 相似文献
18.
In color superconductor the gluon condensate drops down at moderate density but goes up at high density and can even exceed its vacuum value when the density is high enough. 相似文献
19.
We exhibit a method for obtaining the low chemical potential dependence of the dressed quark propagatorfrom an effective quark-quark interaction model. Within this approach we explore the chemical potential dependenceof the dressed-quark propagator, which provides a means of determining the behavior of the chiral and deconfinementorder parameters. A comparison with the results of previous researches is given. 相似文献